javascript 的socket 报出的“200”错误,怎么解决

WebSocket connection to 'ws://127.0.0.1:8020/' failed: Error during WebSocket handshake: Unexpected response code: 200
握手信息200是错误???不是很懂

以下是出事故的代码:
connect : function(url) {

// Websocket initialization
if (this.ws != undefined) {
  this.ws.close();
  delete this.ws;
}
this.ws = new WebSocket(url);      //<==there is a error O~O
this.ws.binaryType = "arraybuffer";

this.ws.onopen = () => {
  log("Connected to " + url);
};

response code 200说明正常,,,

http状态返回代码 1xx(临时响应)
http状态返回代码 2xx (成功)
http状态返回代码 3xx (重定向)
http状态返回代码 4xx(请求错误)
http状态返回代码 5xx(服务器错误)

undefined应该是字符串吧

 this.ws != ‘undefined’

http://blog.csdn.net/zixiao217/article/details/53098700

相应200不是错,但是返回之后执行的代码可能出了错!!!你仔细看看握手之后已改执行哪些代码? 比如

 this.ws.onopen = () => {
  log("Connected to " + url);
};

中有个‘=>’是啥?

这里感觉应该是你的代码错误,因为200是握手成功的,会不会是你的浏览器不知此es6的写法